Controlled temperature measurement integration device of miniature loudspeaker and method thereof

Abstract

A controlled temperature measurement integration device comprises a filter, an adder, a power amplifier, an extracting resistor, a current and voltage filter, a current and voltage integrator and a mathematical logical unit. The filter receives an input signal and forms an output signal. The adder forms an adding signal. Through extraction by the extracting resistor, an extracting signal is formedfor transmitting a sound signal by the miniature loudspeaker, and furthermore a coil thermal voltage signal is formed. The current filter acquires a current-filtered signal from the extracted signal.The voltage filter acquires a voltage-filtered signal from the coil thermal voltage signal. Through integration and operation of the current-filtered signal and the voltage-filtered signal, a temperature signal is acquired.

Description

technical field [0001] The present invention provides a device and method for controlling and measuring temperature of a micro-speaker, especially a device and method for integrating control and temperature measurement of a micro-speaker by using an integrated circuit. Background technique [0002] A micro-speaker usually refers to a speaker set in a portable device, the size is within 15mm*15mm, and the output power is less than 2 watts. Micro-speakers can be used in electronic products such as mobile phones, notebook computers, or personal digital assistants. Please refer to figure 1 , figure 1 is a schematic diagram of a micro-speaker in the prior art, and the speaker device S is generally composed of a coil 100 , a magnet 200 , a speaker 300 and a diaphragm 400 . figure 1 It adopts a card coordinate system, and the three axes of XYZ are as follows: figure 1 As shown, the origin of the coordinate axis is positioned at a certain corner of the horn device for easy posit...

AI Technical Summary

Problems solved by technology

Although the existing technology uses resistance to obtain the temperature of the voice coil to increase the authenticity of the obtained temperature, the instantaneous temperature measured by the sensor will still contain noise, resulting in the obtained coil temperature is still inaccurate; and the temperature is a long-term change process, If only the instantaneous physical quantity is obtained to obtain the temperature, the obtained temperature is inaccurate

Furthermore, every measurement of resistance will inevitably lead to current loss, so the sound quality restored by the speaker will still be reduced

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